Practice Problems
Description of Motion - Scalar vs Vector Quantities
Directions:
On this worksheet you will practice with the basic definitions of introductory motion.
omit
Question 1
A bike messenger traveled 4 blocks North, 7 blocks East, 6 blocks South, and finally 10 blocks West in order to deliver a package in the traffic, congested city. If his trip took 36 minutes, what was the magnitude of his average velocity in blocks/minute?
1.39 x 10
^{-1}
7.5 x 10
^{-1}
2.7 x 10
^{1}
1 x 10
^{-1}
3.61 x 10
^{0}
omit
Question 2
If the messenger in
Question #1
could have traveled directly to his destination, what would have been the direction of his net displacement?
123.7 deg
209.0 deg
213.7 deg
151.0 deg
146.3 deg
omit
Question 3
The magnitude of an object's average velocity can ONLY equal the magnitude of its average speed when the object is
traveling in successive
directions that change by 90º
traveling in a circle
standing still
traveling in a
straight line
omit
Question 4
A scalar is a quantity that can be completely described by stating its
direction
size
size and direction
omit
Question 5
A family taking a vacation traveled 7 hours at 65 mph and then 4 hours at only 49 mph. What was their average speed during this trip?
59.2 mph
54.6 mph
54.8 mph
57.0 mph
omit
Question 6
Which quantity is NOT a scalar?
distance
mass
acceleration
time
omit
Question 7
Which description of an object's motion is more specific: moving at a constant speed or moving at a constant velocity?
constant speed since it demands that the object
has to maintain a constant rate
regardless of its direction of motion
the two terms are completely equivalent
constant velocity since it demands that the object
not only move at a constant rate,
but also maintain a constant direction
omit
Question 8
A student warming up for practice travels one full circuit, 400 meters, around the track. Initially he jogs 72 meters at 1.5 m/sec, then runs 216 meters at 2.2 m/sec, and finally cools down by finishing the final 112 meters at 1.0 m/sec. What was his average speed?
2.35 m/sec
1.74 m/sec
1.55 m/sec
1.57 m/sec
omit
Question 9
What was the student's average velocity in
Question #8
?
0 m/sec
cannot be determined
the same as his average speed
omit
Question 10
During a 30 minute period of time, one car moves at a constant velocity of 45 mph, N, while a second car moves at a constant velocity of 45 mph, W. During this time interval, the cars would have the same
A. instantaneous speed
B. instantaneous velocity
C. displacement
D. acceleration
A and D
A and C
B and C
C and D
B and D
omit
Question 11
A moving van completes its journey of 540 kilometers in 10 hours. Approximately how far should it have traveled 6.5 hours after beginning its trip?
351 km
189 km
83 km
228 km
PhysicsLAB
Copyright © 1997-2023
Catharine H. Colwell
All rights reserved.
Application Programmer
Mark Acton